9021.90.40 - Parts and accessories for hearing aids and for pacemakers for stimulating heart muscles

This HTS category, 9021.90.40, specifically enumerates parts and accessories designed for use with hearing aids and pacemakers intended for stimulating heart muscles. This classification captures components that are integral to the functioning or maintenance of these medical devices, but are not the complete devices themselves. Examples include earpieces, tubing, batteries, and external control units for hearing aids, as well as lead wires and pulse generators for pacemakers.

It is important to distinguish this category from its sibling, 9021.90.81, which is designated for "Other" parts and accessories. While 9021.90.40 provides a specific grouping for components related to hearing aids and cardiac pacemakers, 9021.90.81 would encompass parts and accessories for other medical devices falling under the broader heading of 9021 that are not specifically addressed elsewhere. Therefore, classification hinges on the intended use and compatibility with the aforementioned medical devices.

Within this category, further subdivisions exist to provide more granular classification. Subcategory 9021.90.40.40 is dedicated to parts and accessories specifically for hearing aids. Conversely, subcategory 9021.90.40.80 covers parts and accessories for pacemakers that stimulate heart muscles. This bifurcation allows for precise identification of whether the component is destined for auditory enhancement or cardiac rhythm management.